COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Zhengang Bu,Jianhua Li,Siqi Fang,Yuanlin Zhan,Wenzhuo He,Yibin Huang
The uniform and stable deposition of metal-organic frameworks (MOFs) onto membranes without compromising their performance presents a significant challenge. This study reports the fabrication of a photocatalytic self-cleaning membrane using hydrothermal and photochemical substitution methods. These methods enabled the uniform and stable deposition of β-FeOOH nanorods, m-MIL-100(Fe), and Ag nanoparticles (NPs) not only on the members surface but also throughout the interior of polyvinylidene fluoride (PVDF) membrane pores. The synergistic effect of these materials and their uniform and stable distribution within the PVDF membrane resulted in superior photocatalytic efficacy. The membrane's excellent photocatalytic performance facilitated the degradation of most pollutants, ensuring prolonged usage. Unlike other photocatalytic membranes requiring additional cocatalysts, our membrane degraded over 90% of various dyes without H 2 O 2 , demonstrating a greener usage mode and higher photocatalytic efficiency. The valence band (VB) and conduction band (CB) of β-FeOOH nanorods and m-MIL-100(Fe) were calculated, confirming the existence of a type-II heterojunction for the first time. Free radical trapping experiments identified hydroxyl radicals (·OH) as the primary reactive species in the degradation process. This research provides a novel approach to uniformly and stably load MOFs on membranes, enhancing their properties and offering insights into fabricating multifunctional photocatalytic membranes.
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DOI
高影响因子
Inorganic Chemistry Frontiers
·
2024
·
IF 6.1
Han Guo,Guangxu Yao,Chuanzhen Feng,Mi Wang,Huijuan Zhang,Yu Wang
Transition metal oxygen evolution/reduction reaction (ORR/OER) catalysts applied to Zn–air batteries (ZABs) have been extensively investigated, but the problems of transition metal electrocatalysts being prone to agglomeration and deactivation at high temperatures and the insufficient stability of the existing single carbon-based catalysts still exist. Herein, we present a dual-substrate strategy that confines first FeNi alloys in N-doped porous carbon shells and then embeds them onto dual-substrate nanofibers of Ti4O7 and C (FeNi/NC@Ti4O7-CNFs) by electrostatic spinning and annealing treatments. The domain-limiting effect provided by the porous carbon shells disperses the alloys and there is a strong synergy between the alloys and the N-doped carbon shells to modify the electronic structure. Additionally, Ti4O7 has excellent stability even in strongly alkaline environments. Accordingly, abundant M–NX active sites are achieved by the triple synergistic effect of Ti4O7 and C formed dual-substrate nanofibers, N-doped porous carbon shells, and highly dispersed alloys. The prepared FeNi/NC@Ti4O7-CNFs demonstrated a lower ORR and OER potential difference (ΔE = 0.656 V) than Pt/C and RuO2. The liquid ZAB assembled with this catalyst has a cycle life of more than 320 h. This work provides a valuable strategy for developing highly active catalysts for application in advanced electrochemical energy devices.
研究领域:
材料科学
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电化学
·
能源存储
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DOI
高影响因子
iScience
·
2023
·
IF 5.8
Xu Dong,Xiaoshuang Zhou,Lvzhou Li,Xiaoting Cao,Jiawei Xu,Shengping Dai,Yaoyao Jiang,Qingyue Li,Ningyi Yuan,Jianning Ding
Monodomain liquid crystal elastomers (m-LCEs) exhibit large reversible deformations when subjected to light and heat stimuli. Herein, we developed a new method for the large-scale continuous preparation of m-LCE fibers. These m-LCE fibers exhibit a reversible contraction ratio of 55.6%, breaking strength of 162 MPa (withstanding a load of 1 million times its weight), and maximum output power density of 1250 J/kg, surpassing those of previously reported m-LCEs. These excellent mechanical properties are mainly attributed to the formation of a homogeneous molecular network. Furthermore, the fabrication of m-LCEs with permanent plasticity using m-LCEs with impermanent instability without external intervention was realized by the synergistic effects of the self-restraint of mesogens and the prolonged relaxation process of LCEs. The designed LCE fibers, which are similar to biological muscle fibers and can be easily integrated, exhibit broad application prospects in artificial muscles, soft robots, and micromechanical systems.
研究领域:
材料科学
·
机械工程
·
仿生学
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DOI
PubMed
高影响因子
Advanced Materials Interfaces
·
2020
·Vol. 7
·期 19
·2000684
·
IF 4.948
Wenyan Chen,Donghui Xu,Yuancheng Chen,Tang Tang,Shaojie Kuang,Haikuo Fu,Wuyi Zhou,Xiaoyuan Yu
Using polyvinyl alcohol and N-rich polyacrylonitrile as carbon sources, uniform MFe 1– x Mn x PO 4 (M = Li, Na)/N-doped C nanofibers are synthesized by sol–gel pretreatment and an electrospinning method followed by calcination. The as-prepared nanofibers exhibit a 3D homogenous network with uniform distribution of MFe 1− x Mn x PO 4 nanoparticles. The lattice distorts after Mn-doping without altering the original crystalline structure, increasing conductivity and enhancing the efficiency of Li + /Na + diffusion. When applied for lithium ion batteries, the optimized LiFe 0.8 Mn 0.2 PO 4 /C nanofibers deliver a considerable initial capacity of 169.9 mAh g −1 with coulombic efficiency of 92.4%. It also displays the excellent cycling stability with reversible capacity of 160 mAh g −1 after 200 cycles at 0.1 C and high rate performances with the specific capacity of 93 mAh g −1 at 5 C. Furthermore, NaFe x Mn 1− x PO 4 /N-doped C nanofibers are also synthesized by the same method for sodium-ion batteries, which exhibit an initial capacity of 134 mAh g −1 and specific capacity of 106 mAh g −1 at 0.1 C and 90 mAh g −1 at 1 C after 200 cycles. Owing to the facile fabrication process, these nanofibers are promising cathodes for lithium/sodium ion batteries with excellent electrochemical performances.
研究领域:
材料科学
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电化学
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纳米科技
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能源存储
·
固态化学
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DOI
高影响因子
Molecular Catalysis
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2017
·
IF 0
Xueliang Cui,Yunfeng Zheng,Meng Tian,Zhengping Dong
In this study, magnetic SiO 2 @Fe 3 O 4 @m-MnO 2 microspheres with uniform morphology and mesoporous MnO 2 shell were successfully prepared. The MnO 2 sheets structured mesoporous shell could provide a large specific surface area, thereby increasing the catalytically active sites. Thus, magnetic SiO 2 @Fe 3 O 4 @m-MnO 2 microspheres were used as a catalyst support. Palladium nanoparticles (Pd NPs) were successfully anchored with high dispersion on SiO 2 @Fe 3 O 4 @m-MnO 2 surface, successfully obtained Pd(6%)/SiO 2 @Fe 3 O 4 @m-MnO 2 nanocatalyst with a Pd weight percentage of 6%. The obtained nanocatalyst was employed in the hydrodechlorination of highly toxic 2,4-dichlorophenol and catalytic reduction of the widely used nitroaromatics and organic dyes under ambient conditions. In these catalytic reactions, the Pd(6%)/SiO 2 @Fe 3 O 4 @m-MnO 2 nanocatalyst with large and accessible pore surface area exhibited excellent catalytic activity as compared to other noble metal supported catalysts. The Pd(6%)/SiO 2 @Fe 3 O 4 @m-MnO 2 nanocatalyst could also be easily and conveniently recovered from the reaction mixture by using an external magnet, attributed to its magnetism, thus preventing the catalyst loss. Moreover, it could also be reused for at least six times without significant decrease in the catalytic activity, indicating its excellent reusability and stability. This study provides a useful platform and a new perspective for fabricating mesoporous MnO 2 microspheres based noble metals modified catalysts for environmental catalysis.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2023
·
IF 8.6
Nuanyuan Xu,Pengjia Dou,Hui Wen,Changkun Liu
Membrane-based nanofiltration is a crucial technique for treating dyestuff-salts wastewater, owing to its excellent selectivity towards mono/multivalent ions and organic matter. In this study, a facile and highly practical method was employed to enhance the hydrophilicity of the PE matrix through in-situ growth of poly( m -phenylenediamine) on the PE fibrils via the chemical oxidative polymerization of MPD. The inclusion of the poly( m -phenylenediamine) on PE enables the formation of homogenous and defect-free PA layer showing a unique honeycomb-like Turing morphology with characteristic crater-belt structure. Furthermore, the pendant amine groups from the poly( m -phenylenediamine) chain promotes the formation of a PA layer with a smaller effective mean pore size and a sharper pore size distribution, resulting from the formation of an extra polyamide network (reaction of PMPD with TMC) within the PA layer. The as-prepared PE-based NF membrane exhibits a high pure water permeance of 17.7 LMH bar −1 , exceptional Na 2 SO 4 rejection of 99.3%, and a long-term stability for cross-flow filtration for over 10 days. The PE-based NF membrane exhibits the water flux 2.2 times higher than that of the commercially available DK and DL membranes while maintaining a high salt rejection. Additionally, the PE-based NF membrane demonstrates exceptional selectivity, with a value of 115 for the separation of NaCl/Na 2 SO 4 and 339.8 for Cl - /SO 4 2- in a binary salt mixture. Furthermore, the PE-based NF membrane shows ultra-high selectivity values of 990 for CR/NaCl and 1039 for MB/NaCl in the treatment of dye/salt mixtures, respectively, which are significantly higher than those of the DK and DL membranes. The findings of this study highlight the potential of the in-situ growth of poly( m -phenylenediamine) on PE fibrils as a simple and cost-effective method for the modulation of hydrophilicity to enhance the NF membrane performance.
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DOI
高影响因子
WASTE MANAGEMENT
·
2025
·
IF 7.1
Dongping Song,Tao Huang,Xiaolong Sun,Yun Xia,Chong Luo,Jialin Cui,Kai Chen,Weihua Liu,Jie Ren
The poor pozzolanic activity and high alkalinity of municipal solid waste incineration fly ashes (MSWI-FA) would deteriorate the stability of the MgO-SiO 2 -H 2 O (M−S−H) binder system, further inhibiting the treatment capacity of cement to wastes. In this study, sulfhydryl-functionalized graphene oxide nanoparticles (SFG) were synthesized and incorporated into the MSWI-FA-blended M−S−H (MSH-MSWI-FA) system to strengthen the solidification/stabilization (S/S) of both heavy metals (HMs) and chloride salts in the matrix and mechanical stability of cement. The linear increases in nanomaterials (from 0.5 % to 2.5 %) and MSH (from 40 % to 80 %) both decreased the concentrations of HMs and Cl anions leached from the solidified cubes in the MSH-MSWI-FA cementation. The least leaching concentration of Zn, Cu, Pb, Cd, Cr, and Cl were 0.0046 mg/L, 0.0032 mg/L, 0.014 mg/L, 0.00068 mg/L, 0.030 mg/L, and 0.36 g/L from the SFG-MSH-MSWI-FA cemented samples, respectively. The incorporation of graphene oxide nanoparticles (NGO) and SFG elevated the residual moieties of HMs, enhanced the mechanical strength and acid resistance, and improved the microstructural properties of MSH-MSWI-FA cementation. SFG played a more dominant role in the enhancement than NGO. Sulfhydryl-functionalization for nanomaterials intensifies the improvement process. The minerals including M−S−H, CaO-SiO 2 -H 2 O (C-S-H), and Phase-5 were formed in the MSH-MSWI-FA cement. Silica fume (SF), lightly burnt magnesia (CC-MgO), and MSWI-FA reacted with each other in a ternary system, which induced the self-alkali-activated cementation of C-S-H, M−S−H, and magnesium oxychloride (MOC) cement.
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF ONCOLOGY
·
2023
·Vol. 62
·期 5
·1-21
·
IF 5.2
Ting Xue,Yaodong Chen,Jia Xu,Weiqin Du,Pengzhou Kong,Xinri Zhang
Lung cancer is the leading cause of cancer‑related mortality worldwide. Non‑small cell lung cancer (NSCLC) is the most common pathological subtype of lung cancer and is associated with low 5‑year overall survival rates. Therefore, novel and effective chemotherapeutic drugs are urgently required for improving the survival outcomes of patients with lung cancer. Cyclovirobuxine D (CVB‑D) is a natural steroidal alkaloid, used for the treatment of cardiovascular diseases in Traditional Chinese Medicine. Several studies have also demonstrated the antitumor effects of CVB‑D. Therefore, in the present study, the therapeutic effects of CVB‑D in lung cancer and the underlying mechanisms were investigated using the in vivo xenograft model of NSCLC in nude mice and in vitro experiments with the NSCLC cell lines. Bioinformatics analyses of RNA‑sequencing data, and cell‑based functional assays demonstrated that CVB‑D treatment significantly inhibited in vitro and in vivo NSCLC cell proliferation, survival, invasion, migration, angiogenesis, epithelial‑to‑mesenchymal transition and G2/M phase cell cycle. CVB‑D exerted its antitumor effects by inhibiting the KIF11‑CDK1‑CDC25C‑cyclinB1 G2/M phase transition regulatory oncogenic network and the NF‑κB/JNK signaling pathway. CVB‑D treatment significantly reduced the sizes and weights and malignancy of xenograft NSCLC tumors in the nude mice. In conclusion, the present study demonstrated that CVB‑D inhibited the growth and progression of NSCLC cells by inhibiting the KIF11‑CDK1‑CDC25C‑CyclinB1 G2/M phase transition regulatory network and the NF‑κB/JNK signaling pathway. Therefore, CVB‑D is a promising drug for the treatment of NSCLC patients.
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DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 42
·51233
·
IF 3.125
Jiali Xu,Li Yuan,Guozheng Liang,Aijuan Gu
It is still a challenge for simultaneously achieving high heat resistance, high strength and outstanding electrochemical performance for separators in power lithium-ion battery (PLB). Herein, new high performance electrospun separators are developed through building unique structure based on polyimide (PI) and poly (m-phenylene isophthalamide) (PMIA). Orthogonal tests (4 4 ) show that the magnitude order of electrospinning factors on the morphology of membrane is concentration>injection rate>receiving distance>voltage. With the optimum factors, the electrospun membrane (PI/PMIA) was prepared, which was further pressed at 100°C for 10 min to get treated membrane (H-PI/PMIA). Interestingly, the comprehensive performance of PI/PMIA is not a simple combination of those of PI and PMIA; instead, PI/PMIA has much better thermal and mechanical properties than both PI and PMIA, proving that PI/PMIA has a synergistic effect. PI/PMIA and H-PI/PMIA not only have good ionic conductivity and electrochemical stability, but also have superiorly high properties including dimensional stability (thermal shrinkage temperature>300°C), tensile strengths (24.1 MPa for PI/PMIA, 34.3 MPa for H-PI/PMIA) and capacity retentions (97.9%, 99.2%) compared with electrospun membranes for PLBs reported in the literature so far (SCI database). The mechanism behind these attractive performances is discussed from condensed structure of membranes.
研究领域:
材料科学
·
能源科学
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DOI
高影响因子
HYDROMETALLURGY
·
2025
·
IF 5.3
Yanfei Fan,Dandan Gao,Dongdong Li,Dewen Zeng
Alum is an important intermediate for the extraction and purification of Cs or Rb chemicals, due to its excellent separation ability for Cs, Rb and K. Although the solubility sequence K-alum > Rb-alum > Cs-alum has been well known, the separation factors among Cs, Rb and K during the formation of alum have not been determined. The formation of solid solution of alum controls the Cs or Rb content and Cs/Rb/K ratio in the sequentially precipitated Cs, Rb and K alums. In this study, the thermodynamic equilibrium separation factors were determined from the solid solution-aqueous solution equilibrium data of the two mixed alum systems: (i) RbAl(SO 4 ) 2 , CsAl(SO 4 ) 2 , and H 2 O, and (ii) KAl(SO 4 ) 2 , RbAl(SO 4 ) 2 and H 2 O. The separation factor β Cs/Rb varied from 48 to 2 with the increase of the Rb/Cs ratio in system (i), and β Rb/K varied from 22 to 0.2 with the increase of the K/Rb ratio in system (ii). This suggests that the purification of Cs or Rb using alums is more efficient from raw materials containing high Cs/Rb or Rb/K ratio than that from low Cs/Rb or Rb/K ratio. In kinetic studies, the apparent separation factors β Cs/Rb and β Rb/K were highly affected by the recrystallization process of cooling or non-cooling and the initial composition of raw alum, showing asymmetric kinetic intensification. The separation factors β Cs/Rb or β Rb/K obtained in the “dissolution by heating and crystallization by cooling (DHCC)” process for the raw alum with high initial Cs/Rb or Rb/K molar ratio is several times larger than the equilibrium value expected from thermodynamics. Finally, CsAl(SO 4 ) 2 and RbAl(SO 4 ) 2 with a metal-based purity of 99.97 % and 99.94 %, respectively, were obtained by using the DHCC process 3–4 times.
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2022
·
IF 4.889
Lu Long,Kaiji Xu,Kok Bing Tan,Dongren Cai,Yucheng Yang,Shu-Feng Zhou,Guowu Zhan
Catalytically agitating paddles are essential to perform liquid-solid heterogeneous catalytic reactions on an industrial scale due to the improved mass transfer and easy catalyst recovery. Herein, bimetallic oxides were formed after the calcination of nanomaterials derived from metal-organic frameworks (MOFs). Particularly, Mn(M)-BTC nanomaterials were synthesized by self-assembly of Mn 2+ ions (mixed with various dopants such as Cu 2+ , Ce 3+ , or Fe 2+ ) and H 3 BTC ligands in a mixed solvent of ethanol and water. It was found that in the powdery form, the Mn-Cu oxide derivate exhibited the highest degradation rate in the catalytic wet peroxide oxidation process (CWPO process), which was significantly higher than that of single metal oxide as well as Mn-Fe and Mn-Ce oxide derivates. The reason was caused by the synergistic effect between Mn-Cu promoted the formation of Mn 3+ and Cu + species to boost the CWPO reaction. Furthermore, the obtained Mn-Cu powdery catalysts were 3D-printed to obtain monolithic agitating paddles with different geometries, which were then mounted on a central shaft in the stirred reactor. An advanced oxidation process was used to investigate the effect of 3D patterns on the degradation efficiency of various organic dyes. It was discovered that the 3D-printed grid with higher cell density (484 cpsi) had better liquid mixing efficiency and thus better catalytic performance, which could be repeatedly used more than seven times. Additionally, the numerical simulation analysis (computational fluid dynamics) revealed a good mixing efficiency and improved mass transfer in the entire reactor equipped with the designed monolithic agitating impellers.
研究领域:
化学工程
·
材料科学
·
环境工程
·
催化
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DOI
高影响因子
FOOD CONTROL
·
2021
·
IF 5.548
Xianli Wang,Qicai Zhang,Zhiyong Zhao,Weiguo Song,Lin Cheng,Junhua Yang,Shanshan Chen,Shuhui Guan,Wei Song,Qinxiong Rao,Zhihui Zhao
Dietary intake is a major pathway of human exposure to perfluorinated compounds (PFCs). Livestock and poultry meats (chicken, beef, mutton) account for a significant proportion of dietary consumption in China, and thus it is crucial to investigate the levels and composition profiles of PFCs in consumer meats to assess and mitigate potential health risks. However, rapid and simple analytical methods for such investigations are lacking. This study addresses this shortcoming by developing a rapid filtration clean-up method using carboxylic multi-walled carbon nanotubes (CMWCNTs) for the detection of 14 PFCs. Good linearities (R 2 > 0.99) were obtained for all 14 PFCs in chicken, beef, and mutton. Recoveries ranged from 65 to 145% (except perfluorotetradecanoic acid, PFTeDA) with relative standard deviations (RSDs) lower than 16%. Method limits of detection (LODs) were between 0.12 and 0.83 ng g −1 d.w. Subsequently, this method was applied for the analysis of 46 livestock and poultry meat samples collected from markets in Shanghai. PFCs were detected in all samples with total concentrations of 1.61–4.27 ng g −1 wet weight (w.w) in chicken, 1.51–5.56 ng g −1 w.w in beef and 1.61–8.15 ng g −1 w.w in mutton. Perfluorooctanoic acid (PFOA) and perfluorobutanoic acid (PFBA) were the predominant compounds in these samples and accounted for over 92% of ΣPFCs. For regulated compounds such as PFOA, risk quotients (RQs) were determined to be much lower than 1. This suggests that chicken, beef, and mutton from Shanghai market pose very low PFC exposure risk to residents. However, high detection frequency of the unregulated PFBA demands further investigation of short-chain PFCs in consumer meats.
研究领域:
食品安全
·
环境科学
·
分析化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）